Builder mechanism for spinning or winding machines



,J. A. SKEDGELL 5 Sheets-Sheet 1 ATTORNEY Oct. 25, 1927.

BUILDER MECHANISM FOR SPINNING OR WINDING'MACHINES Filed April v, 1927 i l l`\\\\. M lI l. \\|\\\\ll n W f. l m11 i l l mu mln."

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Oct 25 1927 J. A. SKEDGELL BUILDER MECHANISM FOR SPINNING OR WINDING MACHINES s sheets-sheet 2 Filed April '7. 1927 BY W ATTORNEY 0t 25 1927 J. A. SKEDGELL BUILDER MECHANISM FOR SPINNING 0R WINDING MACHINES 3 lShee'cs--Sheet 5 Filed April 7, 1927 LVM /N VENTR jpw a.

A TTORNEY Patented Oct. 25, 1927.

' UNITED STATES vJOHN A. SKEDGELL, oF READING,

PENNSYLVANIA, ASSIGNOR TO DRAPER CORPORA-4 TION, OF HOPEDALE, MASSACHUSIE'1".13S, A

CORPORATION F MAINE.

BUILDER MECHANISM FOR SPINNING 0R 'WINDING- vllfIA-(LBll'llils.

Application led April 7,

This invention relates to builder mechanisms for spinning or winding machines, and is more particularly concerned with such mechanisms which are provided with 5 a"bunch;` building attachment.

It is now the ordinary practice to provide filling carriers yor, bobbins which are to be employed in feeler looms with preliminary windings,L technically known as la' bunch `to provide on the filling carriers'or'bobbins a reserve-supply of yarn to insure layinga full pick vof filling in the shed on the last pick of the shuttle prior to filling replenishment, and many forms of builder mechai5 nisms with bunch building attachments have been devised for thispurpose. The'present invention, however, lis a further development of the builder mechanisms shown and` ,described in the Horace 'I-I. Burdett Patents, Numbers 1,556,814, dated October '13, 1925; 1,556,815, dated October 13, 1925, and 1,579,190, dated March 30, 1926, wherein av worm carried b thebuilder arm andhaving both rotary an transverse movements relative thereto, cooperates with a bunch building device or diskv rotating with the main builder cam, and in such constructions the worm on the builder arm is moved by the .rotary bunch building device out of operative relation therewith on completion of the bunch, whereupon regular traverse is initiated.

In providing filling carriers or vbobbins with the reserve supply of filling or bunches, due regard must be had to'the width of the loom in' which such filling carriers or bobbins are to be employed for laying the filling in the shed, and likewise it is desirable in connection with certain feeler mechanisms 40 employed in feeler looms to position the preliminary windings or bunches at different portions of `thefilling carriers or bobbins, sometimes near the head of the filling carriers or bobbins, and at other times more remote therefroma- One of the important features of the present invention, consists.v ina builder mechanism having Aa bunch builder attachment which may be dil 7 issociatedwith spinl ning orfwin 'ng m lbil-les.;nl ow in general use'and ivhei'eifn'tliefamou of yarn constituting such bunches ,ma y e "varied to suit the condtionsof tlie`-loom in which such filling-carriers or 'bobbins vare employed,

and another important featureof the pres- 1927. serial No. 181,820.

ent invention consists in the ready adaptation of the builder mechanism to place the bunches on filling carriers or bobbins at different positions along the barrels of the filling carriers or bobbins lto thereby ladapt such filling carriers or bobbins for use with different kinds or ycharacters of feeler mechanisms.

In accordance with the present invention. the main builder cam for laying regula-r service traverse is loosely mounted, and when the bunch builder mechanism is operating to build the bunch, such main builder cam remains idle and in a predetermined position, and is given rotary movement on the completion of the bunch to initiate regular service traverse. 1 i

In accordance with another feature of the present invention, the main builder camis h eld in non-rotative and predetermined position with a low part of the cam opposite the cam follower on the builder arm during the bunch building operation, and the worm which iscarried' by the builder arm, and its f cooperating bunch building device, are rela- .f tively adjustable towards and from each other to vary the position of the bunch on the bobbins in accordancel with the character of feeler mechanism employed in the loom.` v

'The invention and new features thereof cof . and novel combination of parts will best be made clear from the following description and the accompanying drawings of one good form thereof, it being understood that 1 variations may be made in details without departing from the true scope of the invention as defined by the claims.

In the drawings:

Fig. 1 isla perspective view of a part of a spinning or winding machine, showing more particularly the builder mechanism of the present invention associated therewith;

Fig. 2 is a side elevation on an enlarged 100 scale showing the relation of parts during the bunch building operation;

Fig, 3 is a front elevation showing more particularly the relation of parts during the bunch building operation;

Fig. 4 is a section on the line 4--4 of Fig. 2; i

Fig. 5 is a section on the line 5-5 of Fig. 4, showing the predetermined position of the main builder cam and its relation to the 110 ing to lift the ring rail.

cam follower on the building arm during the bunch building operation; l, F Fig. 6 is a section on the line 6-6 of ig. 7 shows a fillin carrier or bobbin with thebunch on the arrel thereof at a point remote from the head of the filling carrier or bobbin; and

Fig. 8 is a view similar to that of Fig. 7 but showing the bunch adjacent the head of the filling carrier or bobbin.

The frame 1 of the spinning 0r Winding machine may be of usual construction, and, as shown, the side frames thereof are connected by the cross-girths 2 and 3, the upper one of which may constitute the usual spindle support on which a series of s indles for receivin the filling carriers or gobbins are mounte for rotative movement, and, as indicated'in the present instance, such spindles are rotated by means of the band 4 and rotating tin drum 5, although, as will be apparent, any suitable means may be employed for giving rotative movement to the spindles.

The spindles 6, which, as before stated, are mounted for rotative movement on the spindle rai1 2 and receive the filling carriers or bobbins on which yarn is to be wound, extend upwardly through the ring rail 7, on which the usual spinning rings 8 and travelers 9 are mounted, the rings and travelers constituting guiding means for the yarn in laying it upon the filling carriers or bobbins. The ring' rail 7 is supported on the rods 10, of which there may be a suitable number, and the lower ends of such rods 10 rest upon a pin or roll 11 mounted on the arm 12 which is pivotally supported at 13 upon a bracket 14d such arms 12 being under the influence of a'weight 15 normally tend- Connected with the arms 12 (one only of which is shown in the present instance) is the segment 16f to which is secured the flexible connection 17 which extends over the guide pulley 18 and is connected at its lower end to the builderarm. It is usual in mechanisms of this gene-ral type to let back on the flexible connection 17 during the regular traverse, in order to lay the yarn in conlcal layers upon the filling carriers or bobbins, and one means of effecting this purpose is shown more particularly in Fig.l 2.

The builder arm 19 is pivotally mounted at 20 and is normally under the infiuenceI of a weight 21 tending to lift the outer or free end of the builder arm, as usual in this class of machines. The let-back mechanism herein shown consists of an arm 22 pivotally mounted at 20 and the outer end portion of which at 23 ismconnected with the flexible connection 17, thereby associating the builder arm with, the traverse mechanism or ring rail. The builder arm as herein shown in the present instance of the invention is provided with' av segmental guide 24 in which is mounted the toothed. rack 25 having a roll V26 which acts upon the curved portion of the arm 22 to effect a let-back on thefiexible connection during main service traverse. The teeth of the rack 25 are operatively engaged with a worm 27 on the pick shaft 28, to the outer-end of which -is connected the pick wheel 29 which isv actuated step-by-step during the swinging movement of the builder arm to move the rack 25 and effect let-back upon the 'flexible connection 17. This mechanism is merely one of the types of builder arm and let-back mechanism that may be employed in connection with the present invention, althoughl any other character of builder arm and let-back mechanism may be used, since the details thereof form no part of the present invention.

The main builder cam shaft mounted in the machine'frame for rotative movement, and such rotative movement is imparted to the main builder cam shaft through any suitable train of mechanism connected with a going part of the machine, but since such actuating mechanism of the main builder cam shaft may be of usual construction now well understood in the art and since the details thereof constitute no essential part of the present invention, such actuating mechainsm for herein shown and described.

The main builder cam 31` is loosely mount-ed upon the rotating shaft 30 and during later appear, such main builder cam is held in non-rotative predetermined position and on completion of the bunch the main builder cam is actuated to initiate in connection with the cam follower 32 on the builder arm the regular service traverse. Any suit-able means may be employed for predeterminately positioning the main builder cam in rotative position during the bunch buildingv operation, and as one good form of means to this end, the main` builder cam 31 has connected thereto one or more weights, as herein shown, which, when the main builder cam is freed for rotative movement7 turn the main builder cam into the predetermined position desired.

As shown in the present instanceI of the invention, the main builder cam has secured thereto a dependingarm 33, and, as shown in the present instance. such connection be-` tween the arm 33 and the main builder cam 31 is effected by means of a bolt 34 which carries a weight 35, the construction being such that when the main builder cam is free for rotative movement it will be turned rotatively into the predetermined rotative position. The weighted arm 33 may be sufiicient in itself to effect this rotative movement of the loosely mounted main builder cam, but, in the present instance of the inven- 30 is suitably bunch building operation, as will4 the cam shaft is not tion, the builderl cam is shown as provided with a further weight 36 which in connection with the weight'35 relatively positions the main builder cam during the bunch building operation, so that a low portion of the cam, as at 37, shall be opposite the cam follower 32 as indicated in Fig. 5. The hub portion of the arm 33 is-utilized in the present instance of the invention to prevent movement of the main builder cam 31 longitudinally of the rotating main builder cam shaft 30, and to this end the hub portion of the arm 33 is provided with a pin of lug 38 which engages a groove in the stationary projection 39 which may be appropriately secured to the machine frame 1.

Mounted upon the driven main builder cam shaft for rotative movement therewith and for movement laterally thereon is a. bunch building device. which as shown -is constituted asla scalloped disk, in order to impart short traverse movements to the bunch during the bunch building operation, at which time the main builder cam is idle. as hereinbefore stated. In the present. !n stance of the invention. the bunch building device 40 is connected with a hub portion 41 splined to the driven main builder cam shaft 30, and, in the present instance of the 1'nvention, such splined connection is afforded by means of a in 42, the ends of which project beyond t ecylindrical surface of the cam shaft and engage suitable grooves 43 Ain the hub of the bunch building device 40.

the result being that the bunch building device 40 is rotative with the main builder cam shaft and is movable longitudinally thereof into vand out of bunch building position, as will later appear.

The hub portion 41 of the bunch building device is provided with a groove 44 which is engaged by pins 45 on the yoke 46 pivotally mounted at 47 and connected to a hand or other lever 48, the construction being such that while the bunch building` device 40 rnay rotate with the main builder cam shaft, it may be moved longitudinally thereof by the manually operated means 48.

The end portion of, the hub 41 of the bunch building device vis provided with a clutch member 49 adaptedto engageA with a complemental clutch member 50 secured to the main builder cam- 31, the construction being such that when the bunch building device 40 is moved laterally awav from the main builder cam by the manually operated lever 48. the clutch members will be disengaged, thereby freeing the main builder cam and permitting the weights connected thereto to turn the main builder cam into a predntermined position to locate the low portion 37 of the builder cam opposite the cam follower on the builder arm.

Secured to the builder arm by suitable. means, such as the bolts 51, is a bracket 52 having a laterally extending portion 53 and an upwardly extending portlon 54, the latter of which is provided with an upwardly extending slot 55.

Mounted for vertical adjustment in the slot 55 is the worm supportln pin 56 which may be secured in adjusts position in the slot 55 by clamping 'means such as the nuts 57, which may be appropriately threaded to the worm supporting pin 56. v

In accordance wi `h the present invention, the worm 58 is mounted upon the worm supporting pin 56 and is confined to. rotary movement thereon; that is, it has no movement longitudinally of the worm supporting pin. One appropriate means of eecting this result consists in providing the pin 56 with a barrel portion 59 on which the worm 58 is mounted, the inwardly extending flange portions 60 of the worm confining' the worm from'V movement longitudinal] of the pin in one direction. Secured to t e worm 58 is the weight 61 which may be appropriately connected to the worm by means of a screw 62, and the face of such weight 61 bears upon the end portion 63 of the barrel portion 59, with the result that the Wormy is freedy for rotative movement on the worm supporting pin 56 but is confined from movement longitudinally thereof.

Inasmuch as the main builder cam is aui tomatically positioned rotatively to place the low part of the cam 37 opposite the cam follower 32 during the bunch building operation, it'follows that the worm supporting pin 56 may be adjusted in the slot 55 up-4 wardly or downwardly relative to the bunch building device 40, with the result that the location of the bunch on the barrel of the filling carrierszor bobbins may be in desired posltion. When the worm supporting pin 56A is adjusted upwardly in the slot 55 and towards the bunch building device 40, the bunch a, as indicated in Fig. 8, will be located near or adjacent to the head of `the filling carrier or bobbin, but when the worm supporting pin 56 is adjusted downwardly in the slot 55, the bunch b, Fig. 7, will be located on the barrel of the lling carriers or bobbins at a point remote from the head thereof. This adjustable characteristic of l lo the worm upwardly or downwardly relativel i to thn builder arm to vary the location of the bunch is rendered possible by the fact that during the bunch building operation the main builder cam is idle and the low part 37 of the cam is opposite the cam follower 32 on the builder arm.19, an'd owing to this fact, also, the diameter of the bunch building device 40 may be made relativelysmaller in diameter.

The size of the bunch will depend upon the relative lateral positions of the bunch building device 4() and the worm when they.,

are in bunch building positions. As one -rinor-ail or yarn gui good means for effecting this variation in the size of the bunch, a stop is provlde'd for limiting the lateral movement of `the bunch building device 40 on-the main bullder cam shaft 30, and, as shown in the'present 1nstance of the invention, such stop consists of'a sleeve 64 which may be secured in adjusted position laterally of the ymain bullder cam shaft by means of a set screw 65, whereupon the end portion 66 of thesleeve will be positioned to determine the lateral movement of the bunch building device 40 vunder the manual manipulation of the hand lever 48.

When a series of filling carriers or bobbins have been com letely Wound and the dies are lowered and held in owered position for doiing, as usual, and are substituted by a :fresh serles of unfilled filling carriers or bobbins, the machine attendant manipulates the hand lever 48 thereby moving t-he bunch building .device 40 laterally a ong the main builder cam shaft 3U until it contacts with the stop 66 which determines the part of vthe worm 5.8 that will be engaged by the bunch building device 40 when the ring rail or yarn 4guides are freed from their holding means and the builder arm is raised, -thereb 'determining vthe amount of arn that will be placed 1n the bunch. Suc movement of the bunch building device 40 also disengages the clutch nembers 49 and 50and frees the main bu1ldr cam, which will then assume a' predetermined position rotatively, as determined b the weights 35 and 36, so that during bunc building operation the main building cam is idle. When the machine is started, the bunch building device l40 rotates the worm 58 which acts upon the bunch building device 40 to move it laterall towards the main builder cam and on comp etion of the bunch, the bunch -building device moves laterally out ofl engagement with the worm and simultaneously therewith engages'v the clutch members 49 and 50 so that the main builder cam then becomes operative to lay regular service-'winds It is -sometimes desirable to facilitate the movement of the bunch buildin device 40 laterally towards the main buil er cam 31 in addition to the movement imparted thereto byetherworm, and for this purpose` a spring 67 mounted upon'the hub portion 64 of thestop .acts upon the bunch building device 40 to move it towards the main builder cam, so that on completion .of the bunch the main builder cam and the bunch building device 40' are operatively related to I cause .rotative movement of the main builder cam to vproceed with regular service traverse. e

It is desirable that bunches placed upon successive series of filling carriers or bobbins shall contain the same amount of yarn conamount of yarn laid in the bunch,

stituting thebunch, a condition that is rendered effective in the the invention by providlng the weight 61- upon the worm 58 in order to turn the worm into the same rotative position each timeit is `disengaged from the'bunchbuilding' device 40, so that upon reengagement of the bunch building device 40and the worm, thel two will engage at the same point and consequently the amount of yarn placed Vin 'the bunches of successive series of filling carriers or bobbins will be equal.

lVhere it is desirable to provide the layers of the bunch with a short traverse, the peripheral portion )of the bunch building deresent instance of vice 4() is made irregular or scalloped, as

indicated in the present instance of the invention, so that during the bunch building operation the irregular edge or scallops on the bunch building device 40 will effect' short'traverse of the yarn during the bunch building operation.

From the construction described as a good practical form of the present invention, it will be noted that during the bunch building operation the main builder cam is held from rotative movement in a predetermined position, and on completion of the bunch as .the bunch building devicev 40 is moved laterally by the worm out of .bunch building position, the main builderjcam will be operf atively connected with the rotating bunch building device 4t) to eiiect'regular servicetraverse. Should no bunches be desired in any series of filling carriers or bobbins, the

l machine attendant does not actuate the hand lever 48 to move the bunch building device 40 into bunch building position, whereupon, the main builder cam remains in action and only servicetraverse is laid upon the filling carriers or bobbins. i

As a further development of the builder IOL' mechanisms shown and described inthe Burv dett patents hereinbefore mentioned, the present invention provides a simple' and effective means not only of var ing the but, also, 1n locating the bunch at different portions of the filling carriers or bobbins, as indicated in Figs. and 8. .l

While the clutch members 49 and-50 constitute a good practical means for o eratively connecting and disconnectin t e main builder cam and the bunch buil ing device, it is clear that some other form of mechanism may be employed for this purpose and that detail changes may be made in the construction described to effect the desired purpose a loosely mounted main builder cam, a rotatirregular edge portion to cooperate with the ing bunch building member movable towards and from the main builder cam, a clutch associated with the bunch building member for engagement with and disengagement from the main builder cam, a worm held from lateral movement on the builder arm, and means for moving the bunch buildin member into bunch building relationwi the worm and disengagingthe clutch from the main builder cam that the main builder cam may remain at rest duringthe bunch building operation. n

2. A bunch builder mechanism for spinning or .winding machines, comprisiiiignin combination, a builder arm, a bunch bu ding worm mounted for rotary movement on the builder arm, a loosely mounted main builder cam, a constantly rotating bunch buildiig member movable laterally into bunch buil ing relation with the worm, a clutch which is disengaged from the main builder cam during the bunch building operation and is automatically engaged with the main builder cam by lateral movement of the bunch building member by theworm to rotate the mam builder cam on completion of the bunch.

3. In a spinning or winding machine, the combination of a rotating cam shaft, a main builder cam loosely mounted on the cam shaft, a building arm havin a loosely mountedworm held from latera movement, a bunch building member rotating with the Vcam shaft and normally clutched' to the main'builder cam during regular traverse, and means for laterally moving the bunch building member into bunclibuilding relation with the worm and freeing the main builder cam and automatically clutching the main builder cam for rotary movement with the bunch building member on completion of the bunch.

y4. In a spinning or winding machine, the combination of a loosely mounted main builder cam, a builder arm, a worm onvthe builder arm coniined to rotary movement relative thereto, a rotating device to coop erate with the worm to build the bunch with a short traverse and movable laterally by4 the worm out of bunch building position on completion of the bunch, and means for causing the vloosely mounted main builder cam to be rotated to complete the wind with regular service traverse on completion of the bunch` 5. In a spinning or winding machine, the combination of a loosely mounted main builder cam, a builder arm, a worm on the builder arm conned to rotary. movement relative thereto, a rotating device having an worin4 to build the bunch with a short traverse and movable laterally by the worm out of bunch building position on completion of the bunch, and means for causing the loosely mounted main builder icam to be rotated to complete the wind with regular service traverse on completion of the bunch..

l6. Inl a yspinning or winding-machine, the combination of a 'loosely mounted main builder'cam, a builder arm, a'worm onv the builder arm confined to rotary movement,- a rotating disk havinga scalloped edge to engage the spirals of the worm to buildthe bunch with a.A short. traversel and movable laterally by the worm out of' engagement -therewith as the worm is rotated by the scalloped disk, and clutch means moved into operative engagement with the l loosely mounted main builder cam by lateral move= ment of the scalloped disk out of bunch building position to rotate the main builder cam to complete the Wind with regular service traverse on completion of the bunch.

7 .l A bunch builder for spinning or winding machines, comprising, in combination, a rotating cam shaft, a main builder camloosely mounted thereon, a builder arm, a worm on the builder arm confined to rotary movement, a bunch building member splined to the rotating camf'shaft and having an edge to cooperate with the vworin to build che bunclr and movable by the worm outrof bunch building position, complemental clutch members on the main builder cam .and bunch building member, and manual means for moving the bunchbuilding member on the cam shaft into bunch building shaft into bunch building' position, and

means for adjusting said stop' to vary the size of the bunch.

9. In a spinning or winding machine, the combination of rotary main builder cam shaft, a main builder cam loosely mounted on the cam shaft, a builder arm, .a worin oii the builder arm confined to rotative ymove-` ment, a bunch building device rotating with the cam shaft and movable along said shaft into bunch building relation with the worm and movablel by the wormout of bunch building lposition, clutch means for operatively connecting the rotating bunch building device and main builder cam when the bunch building device is moved out of bunch building position by the worm, and a spring for insuring the `clutch engagement of the rotating bunch building device and loosely mounted main builder cam on completion 'of the bunch, c

10. In a builder mechanism, the combina.- tion of a rotating cam shaft, a main bullder cam, a builder arm, a worm on the builder arm confined to rotary movement, a bunch building device having an irregular edge predetermined and rotating with the cam shaftto cooperate with the wormon the builder arm to build thebunch and-movable by said worm out of bunch buildin position,` means for moving the ybunch bui ding device along said cam shaft into bunch building position, and an adjustable stop for limiting the movement of the bunch-building device along the cam shaft into bunch building position to vary the size of the bunch.

11. A builder mechanism, comprising, in combination a builder arm, a worm carried by the builder arm and confined to rotary movement relative thereto, a rotating and cooperating bunch building device movable laterally into bunch building relation with the worm and movable by the worm out of bunch building position `on completion of the bunch, aloosely mounted main builder cam which .is held stationary during the bunch building operation, and means for operatively connecting the main builder cam with the rotating bunch buildin device when the latter is laterally move by the worm out of bunch building position on completion of the bunch that regular service traverse may be initiated.

12. A builder mechanism, comprising, in combination a builder arm, a Worm carried by the builder arm and confined to rotary movement relative thereto, a rotating and cooperating bunch building device movable laterally into bunch building relation with the worm and movable by the worm out of bunch building position on completion of the bunch, a loosely mounted main builder cam, a weight connected to the main builder cam andacting to maintain it stationary in osition during the bunch building operat1on, and means for causing the main builder cam to be rotated to impart regular. service traverse when the bunch building device is moved out of bunch building position by the worm on completion of the bunch.

13. In a builderI mechanism, the combination of a builder arm having a cam follower, a worm carried by the builder arm and confined to rotary movement relative thereto, a cooperating bunch building device movable into bunch -building relation with the worm and movable by the worm out of bunch building position on completion of the bunch, a loosely mounted main builder cam, means for holding the main builder cam from rotary movement and in predetermined rotary position during the bunch building operation, and means for causing the main builder cam to be rotated on completion of the bunch to impart regular traverse. 14. In a builder mechanism, the combina.- tion of a builder armhaving a cam follower, a worm carried by the builder arm and confined to rotary movement relative thereto, a cooperating bunch building device having an irregular periphery` to impart .a short traverse during'the buncl/Lbuilding operation and movable into bunch building relavtion with the worm and movable by the worm out of bunch building position on completion of the bunch, a loosely mounted main builder cam, means for holding the main builder cam 4from rotary movement l and in predetermined rotary position during the bunch building operation, and means for causing the main builder cam to be rotated on completion ofthe bunch to impart regular traverse.

15. Ina builder mechanism, the combination ofv a builder arm having a cam follower, aworm carried by the builder arm and confined to rotary movement relative thereto, a constantly rotated bunch building device movable laterally into bunch buildin relation with the worm, and -movable y the worm out of bunch building position .on completion of the bunch, a loosely mounted main builder cam, means lfor holding the main builder cam froml rotary movement with a low part of thel cam opposite the cam follower during the bunch building operation, means for changing the relative positions of the bunch building device and Worm towards -and from each other to vary the position of the bunches on the bobbins, and means for causing rotary movement of the main builder cam on completion of the lol bunch to initiate regular service traverse.

16. In a builder mechanism, the combination of a builder arm having a cam follower,

a worin carried by the builder arm and confined to rotary movement relative thereto, a llo constantly rotated bunch building deviceI movable laterally into bunch building relation with the worm and movable by the worm out of bunch building position on completion ofthe bunch, a loosely mounted main builder cam, means for holding the main builder cam from rotary movement with a low part of the cam opposite the cam follower during the bunch buildingoperation, means for changing the relatlve positions of the bunch building device and worm towards and from each other to vary the positionl of the bunches on the bob-bins, and means for operatively connecting the main builder cam and rotating bunch building device on completion of the bunch to cause regular service traverse.

17, In a builder mechanism, the combinav tion of a` cam shaft, means for rotating it,

a main builder cam loosely mounted on the 3 cam shaft, a builder arm having a worm, a bunch building device mounted on the cam shaft,lfor rotative movement therewith and lateral movement thereon to and from bunch building relation with the worm, means for holding the main builder cam from rotative movement and in predetermined rotative p0- sition during the bunch building operation, and means for cooperatively connecting the loose main builder cam with the rotating bunch building device on completion of the bunch to cause regular service traverse.

18. In a builder mechanism, the combination of a builder arm having a cam follower, a bracket on the builder arm, a worm carried by the bracket and confined 4to rotary movement, a constantly rotated bunch buil ing. device movable laterally into bunch building relation with the worm and.A movable by the worm out of bunch building position on completion of the bunch, a loosely mounted main builder cam, means for holding the main builder cam from rotary movement with a low part of the cam opposite the follower durin the bunch buildlng operation, means for a justing the worm on the bracket towards and from the bunch building device to vary the position of the bunch on the bobbin, and means for rotating the main builder cam on completion of the bunch to cause regular service traverse'.

In testimony whereof, I have signed my name to this speication.

JOHN A. SKEDGELL. 

